Dressing tool for grinding wheels



1949- G. J. WALLEN DRESSING TOOL FOR GRINDING WHEELS Filed May 1a, 1946 INVENTOR. GERALD J. WALLEN yam A T TORNEV iatentecl Jan. 11 1949 UNITED STATES OFF-ICE;

2 Clair t e.

This inventionrelates to imprQVem ntsintQQL for dressin thegr ndine facescf m n.- W 1 An. objectof .my invention is to provide; an emery Wheel ess n tool ,emhodv nea 1 9 bricating system iorsupplyin a lubricant under pressure to the bearing surfaces ofthe rotatable cutters.

Another object of my invention is to provide an improved tool for dressing grinding wheels, em odyi novel ad ustable mea s or maint in..- ing .the cutters in properly aligned relationship irr sp ctiveoi thegwear t ereof urin he-n91.- mal operation of the device.

A t er. Object of my invention is. to, roYisie animpr-oved dresser f0r.grinding .tool s havin ga c st ct q which by a on. o t e npve eau sit posses es is capab e o erating emc en v f r a c ide l hange m t a yisp es b e with similar tools of the type nqwpqni nonly used.

Other and further b ects. o m in ent n wi be. ointe wth re a te r i ec a es? nt e pp n ed claims 1" ill-ben ziou w ne il ed int e a u an. und rfi n in -pf the pre e l e. r se. his. ppl ati n P at? l cted j h r in. c rtain ere and det in o f a dresser for grinding wheel .represen t ve of my. invent n, it is to be unde 'tood howevel thatlthje .e' ibodi ment bf my invention herein shown and described isfor the purpose of illustration only and that. therefore it: not to be regarded as exhaustive of the variations 'pf ithe invention.

In the accompanying drawings:

Fig. 1' is a side elevation of a tool fordressin emery wheels embodying my invention, showing parts thereof in section;

Fig. 215 side elevation of the tool as viewed fromanotherside,showing certain parts broken away and in s ectionj Fig. 3 is a perspective view of one of the cutters, showing the means for maintaining them in interconnected "and fixed relat-ionship;

Fig. 4 is a perspective View of'the adjustable Fig. 5 is an enlarged sectional view taken through the head of the device.

Referring to the drawings the numeral I designates a Carrier head formed with suitably spaeed arms 2 and 3 which are provided with opposed threaded holes one having an adjustable boss 4 and the other a stationary boss 53 6 tionedtherein. The boss 4 i's-foin ed with a leplindle or shaft B-Which extends into an axial sqqlget rreee s. 1 i ethe. othe oss. he bas A :is

formed with an annular shouldergflat .one end QHl-ie .spind et and throughthe adjustment of field-bass. the-in erve ina bae .between t s 5 i n .endfi s at o a essfi. and the $119 1.-

cier snq ten d r en thened ienth Qa nQ e...he ein-.1ater des r bed A setm w .9

rtend ee l reuehthe. a r enyof h. .bqe en e ngaeea e i the out r s rface o t e atmfi rme l he s the a os a inst tu n:

. t eno s ed uste Rete b y ieu nald e t e ind e E a tu ee. 1H1. :u en we h, re .i ie nted a 1. .1 sp-li e ers H nned-in. he-usua i l 95 .Ql 9QI Qm .hie gh xtensive use theyareaptto develop a de playandfail to r a wretee ie. .e tnt e an h. We :4 m y be.. d tedwat ilv-i utters irate $liia l9 e at e no.-

e e u q @911 ethe t b a lv sewer han th en t f ee e f ed P F PW e u a e o t e wtlrs. t reb a owi the la v iustmen Qf..- .b e made... th i the u te' e hav peepmel r an e ii e er q taetwitb ne T ebees, .5 1 p e e ably. e med ith t read wh h b r t be n unsp ewed when the. cutters are ifrot ated Tinlthe s e'cured' as byuthreadeigl means tothehead i is an. elf? gated tubnlarlhandle i! 5 withinv which ..a suc "as' eaw odiedlerea'se. At the outerfend of "the tub 'e e e-fi im mfi fi tens n, around ,yvl'iichis v, A e -5..,"A rotata lehand piece l'f is normally' h'eldin connected androtatab e e -t enship with. rsfi et t nd her l5 byinean s pi'ascrewig extending ih-to the nnu ar, roq e f -u ie J sec edes .b i j -ie bil fi r-lnee ie" Qth -hahdme I i la'n gated "screwdfl which'floos ely' ex f ti lfe i fi i he r d mei b ff isc1'ew 20 extends substantially the length of the tubular handle M.- "The "piston which the "Sciew 2 actuates to eject the lubricant from the tubular handle Comprises an internally and externally threaded tubular member 2| through which the elongated screw extends and operatively engages. Mounted on the tubular member 2| are opposed leather cup-washers 22 which are held in separated positions by a flat spacing disc. A spacing ring 23 holds the sides of one of the washers 22 against inward movement while a head on the tubular member 2! performs the same function with respect to the other Washer. A nut 24 screwed on the tubular member 2i holds the spacing ring, the washers and the tubular member in securely assembled relationship. The inherent resiliency of the washers 22 maintains them in firm contact with the walls of the tubular handle I l and thereby prevents the piston from being rotated when the elongated screw 20 is turned. Spring means may be provided for this purpose also. By turnin the hand piece 11 in a certain direction the lubricant is discharged from the tubular handle 14.

In replenishing the supply of lubricant in the tubular handle 14 the head I is first detached, and

thereafter the screw 18 is removed to permit the relative separation of the said handle and the hand piece ll. After the detached end of the tubular handle [4 is inserted in a supply of lubricant, the hand piece is pulled outwardly with one hand while the tubular handle is held by the other hand in a stationary position. The piston is thereupon pulled outwardly from a position near the discharge end of the tubular handle 14 to a position near its opposite end, thereby drawing the lubricant up into the said handle. the tubular handle is again connected to the head, the elongated screw 20 is turned until the hand piece I! is in a position where it can be connected by the screw 18 to the end member I5. When the hand piece is again connected to the end member, the piston may be actuated to discharge the lubricant from the tubular handle Ill through a duct 25 and into an annular channel 26 formed on the boss 5. The lubricant is conducted through one or more radial openings 21 in the boss 5 to the outer end of the axial socket I. A longitudinal axial passage 28 in the spindle 6 is connected to the axial socket l, and one or more radial ducts 29 in the said spindle connects the axial passage '28 with a longitudinally disposed groove 39 on the outer bearing surface of the spindle. The tubular bushing I0 is provided with one or more openings 3| which connects the groove with the bushings outer bearing surface. Thus, when the lubricant is discharged by the piston from the tubular handle I4 it proceeds through the duct 25, the annular channel 26, the radial openings 21, the unoccupied portion of the recess or socket 1, the axial passage 28, theradial ducts 29 to the longitudinal groove 30 in the bearing surface of the spindle 6. Some of the lubricant is conveyed from the longitudinal groove 30 through the openings 3| to the outer bearing surface of the bushing. The lubricant is distributed along the inner and outer bearing surfaces of the bushin l0, and some of it reaches the contacting surfaces of the cutters ll.

Since the passages leading from the tubular handle M to the bearing surfaces of the cutters and bushing are somewhat restricted because of their comparatively small size, a continuous flow of the lubricant to the said bearing surfaces may be insured during the operation of the dresser if the hand piece I1 is turned occasionally to maintain a pressure on the body of lubricant in After I the tubular handle. The movement of the lubricant in a direction away from the bearing surfaces tends to avoid at least a substantial proportion of the particles coming from an emery wheel duringa dressing operation from reaching the said bearing surfaces. Through the aforesaid adjustments and by maintaining a generous supply of lubricant at the bearing surfaces at all times during the operation of the device the operating lives of the cutters, spindle and bushing are prolonged at least until the teeth of the cutters are substantially worn away.

What I claim is:

1. In a tool for dressing grinding tools, a bifurcated head having aligned threaded openings arranged in opposed relation, a normally stationary boss secured in one of the openings and having an axial socket, an annular groove and a radial channel connecting the socket and the groove, an adjustable boss secured in the other threaded opening of the head and having an elongated axial shaft extending into the socket of the other boss the said shaft having a longitudinal channel and a radial passage extending from the said longitudinal channel to the bearing surface of the shaft, a plurality of cutters journaled on the shaft, and means for supplying lubricant under pressure, to the annular groove of the stationary boss, whereby the bearing surfaces of the cutters may be lubricated.

2. In a tool for dressing grinding wheels, a bifurcated head having opposed threaded openings and a duct leading from a lubricant reservoir mounted on the head to one of the threaded openings, a normally stationary boss secured in the last mentioned threaded opening and having an annular groove positioned to receive lubricant supplied by the duct, the said boss having also an axial socket and one or more radial channels connecting the socket and the annular groove,

. an adjustable boss secured in the other threaded opening of the head and having an elongated axial shaft extending into the socket of the stationary boss, the said shaft having a longitudinal channel and one or more radial passages extending from thesaid longitudinal channel to the bearing surface of the shaft, a bushing journalled on the shaft and having one or more passages for conveying lubricant from the bearing surface of the shaft to the outer bearing surface of the bushing,'a plurality of cutters journaled on the bushing and arranged in positions whereby their engagement one with another may be secured by the adjustment of the adjustable boss, and means for forcing lubricant under pressure from the reservoir through the duct in the head, whereby lubricant may be supplied to the bearin surfaces of the shaft, the bushing and the cutters.

GERALD J. WALLEN.

' REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 442,782 Reed Dec. 16, 1890 498,220 Alger May 30, 1893 1,042,761 Brandenburg Oct. 29, 1912 1,220,175 Brisben Mar. 27, 1917 1,276,368 I-Ioy et al Aug. 20, 1918 1,479,219 Bramming Jan. 1, 1924 1,558,402 H Seaman Oct. 20, 1925 2,415,790 Finnerty Feb. 11, 1947 

